Burglar-alarm lock



Feb. 14, 1928.

W. J. TYSON BURGLAR ALARM LOCK 2 Sheets-:Sheet 1 IN VENTOR WILL/AM J- TYSO/V W m A" Z 0 c. i. m m T l H v BY AiM/ Fly- 6 A TTORNEY Feb. '14, 1928. 659,502

' W. J. TYSON BURGLAR ALARM LOCK Filed Dec. 4. 1925 2 Sheets-Sheet 2 INVENTOR III/L7- 13 57 4 W/LL/AMJ Trim I BY ATTORNEY Patented 14, 1928." I

UNITEDSTATES WILLIAM J'T YSQN, 01 NEW YORK, N. Y.

BURGLAR-ALARM Loox.

'Application' filed Decemberj4, 1925. Serial No. 73,217. i

. This invention; relates to a. burglar-alarm lock, and has as its principal object the provision of means whereby an audible alarm is sounded the moment anyone at,-

entering the look.

/ blers or not, will complete an electric cirmade heretofore to solve the problem of burglar-proof locks, by arranging the sig ,nalto be given when" the bolt is operated,

cuit and cause a signal to be? given. Thissignal or alarm continues so long as'the key,

blank, or other instrument-remains 1n the lock.

which will bereadily adaptable to various kinds'of cylinder looks for rendering the same burglar-proof,. bymeans of the sounding of an audible alarm.

A further object of will not affectv the strength of. the lock tions effieiently. V p p I amaware of attempts that have been and the dooropened. It stands to reason forget their that a burglar, having succeeded in forcing an entrance, andlseeing an open doorbefore' 35 him, ,is not going to retire. when he is al ready nthe house. In my invention, the

alarmfis given themoment the key or any other instrument is inserted, and before the bolt is moved. 1 This has the elfectof scarv used as a housing fora rectangular 1 shaped contact member 16, as is shownin ing the burglar away before any damage is done- Suchan alarm acts as thereminder to the rightful occupants who areprone to ments. I I

With these, and other objects in view, the

, invention will be hereinaftermore' particu larly described,- and the combination and.

arrangement of parts will be shown in the accompanying drawings and pointed out in the claims which form part 'ofthis specification, it being understood that. various changes in the size,form, proportion, and

A further object of this invention :isto' provide a device of the character described this invention .is toprovide a very simple constructlon, which. 25 l proper, andstillperform its intended func- Fig; 10

keysin the doors of their'apart- I PATENT- OFFlo invention. ,Reference will now be had to ijthe "drawings, .whereinlike numerals of reference designate corresponding parts throughout thefseveral views, in which:

ing a standard make Yale or tumbler lock, which has been vmade burglar-proof by means of my invention. 7

a Fig. 2'is a cross sectional view of the lock,

the; section'being taken as on the line maain Fig. 1. A

Fig. 3 is a view'of the cylinder barrel 1, showing a channel 9 in the cylindrical wall. Fig. 4 s a view ofthe tumbler cylinder 00 1 I Fig. 1 isa view, partly in section, show-F or key: drum. 10. showinga recess 11 lengthwise on thekeyway side.

111g. 571s an. elevation of a terminal carrier 3, having two contact terminals 4 and 5 'which are connected with electric bell wires 12 and 13. i

'Fig'. .6 is a view showinganinsulation member 6'.

F ig. 7 isa view of'a box structure 8 for i housingthe terminal carrierB, showing a. sem1-circl1lar aperture 1 1 forthe entrance oftwo wires forming an electric circuit. 1

8 is a 'top vi'ew of the box shown in Fig.7.

Fig. 9 is a view, partly in section, showmg another-make of cylinder'which is vdesigned to fit in a mortise lock. The cylinder of this form ofllock is provided with 'lfasltgening the cylinder to the body; of the oc l a thread 21;, forming a ready=means of.

is a cross sectional view of the" lock, the section being taken as on the line 2/#-y;i F I Fig. 111's a view showing a circular plate Fig. '12.

Fig. ,12 is a perspective view of the contact member 16.

Fig. 13 isa perspective view of the" ter- .HllIlfil carrier 17 having two contact terf minals 18 and 19;

Fig. 14 is "a perspectiveview showingan insulation member 20.

serted. Part 3'is a nonconduoting terminal carrier in, which has been incorporated two terminals 4 and ad an electric circuit; placedbeneath the terminal carrier is an insulation member 6 which is used to insulate a spring 7. The. terminal carrier 341ml. the spring 7 are housed in ailnl'stmilhree 8 which is permanently attached to the lock barrel. Thus, the 6011 spring presses-the,

' terminals upwards against the barrel, andin line with the key slot. This upwardumfiom is arrested and limited by the lower end of the barrel which has been hollowed out, forming a channel 9, as is best shown in Fig. 2,-so as to allow the terminalholder-3 loenter and move up a p11:-d'etermimad dis tance. Thusthe terminal carrier can raise the terminals to within, approximately,.one thirty-secondof an inch of the lower end of the key slot, at the recess lll When the key 2 is inserted in thekey slot, it; extends;- approximately, one thirty-second of an inch below the slot, at the recess 11, and thus comes in contact with theterrnina-ls' l' and 5 and completes the electric circuit, and causes an alarm to be sounded.

To prevent the terminals from-coming: in contact with the key drum, or tumbler cylinder 10, as best shown in Fig. 2, its 'lower or slotted end has been partly. cut an to form a recess or hollow space 11 intowhich the terminalsentcr.

Referring to Fig. 9,- it will be-notcd' that the cylinder has athre'ad 21- which is used to'screw the cylinder-into the body of! the lock, and fasten it theretor Part No. 16 as best shown in Fig; 10, acts asan intermediary between the key and the terminals. Part No. lTrepresents the nonconducting terminal carrier. Part No; 22

represents a spring used forseparating; the contact member 16 from the terminal carrier 17, as best shown in'Fig. 10.

The electric bell 25, .which may bemounted at any convenient'point, may be arranged in circuit with any supply of electric current, such asbattcries-QG. It will'rcadily be noted that inthis constructionthecoil sprin pulls the contact member up and away rum the terminals.

Referring to Fig; 10,.it will be-notedithat when the key, is inserted in the-slot, it willd' lace the: contact member 16, force it uiil it touchtfle twoiterminals 18 and 19,. as best shown in Fig. 9, thus com- (ill pletingthe electric circuit, and causing an alarm to be sounded.

'Ilhcdifierence between Fig. 1 and Fi 9 is, the construction shown in Fig. 1 app ies to angnYmlnalock; without any thread on the cylinder barrel, while the construction shown in Figz 9 is used only in a mortise t 1 cylinder lock, in'whioh thereisn thream thecylinder barrel.

I have thus described two embodiments of my invention. I claim as-new, and desireto secure by Letters Patent.

1. A key actuated switch lock, comprising a cylinder'barrel, having a channel in the cylindrical wall opposite the tumblerholos; a tumbler cylinder, having a recesq lengthwise on the keyway'side; a box structure below the recess; an insulating terminal car ricr, havim'm electric terminal contacts,

housed within the box, and facing the keyway; an ineulationmember, below the.- terminal carrier; a spring, exertin a pressure against the key-shank, and insu ation member; when the keyis inserted in the-lock;

2. A- key actuated switch lock, ofthe tum bler-type, known as Yale locks; comprising a cylinder barrel, having a ohannel'in the cylindrical wall,oppesite the-tumbler holes; a. tumbler cylinder, having a recess lengthwise on the keyway side; a box structure,

below the recess, and permanently fastened to the lock; an insulated terminal carrier;

having two electric terminal contacts, housed WILLIAM J. TYSGNL 

